Nut-lock.



T. NUSSBAUM,

, Nur-'Lo APPLICATION FILED A 0.1916,

1,245,957. r Patented Nov. 6,1917;

narran strains raaniafr operon.

THEODORE NUSSBAUM, 0F BANNING, CALIFORNIA, ASSIGNOR OF ONE-.HALF T WILLIAM 'lVL FEWEL, 0F REDLANDS, CALIFORNIA.

NUT-LOCK.

Specification of Letters Patent.

Patented Nov. 6, 1917.

Application filed October 30, 1916. Serial No. 128,612.

To all whom t may concern.'

Be it known that I, THEoDoRn NUSSBAUM, a citizen of the Empire of Germany, residing at Banning, in the county of Riverside, State of California, have invented new and useful Improvements in Nut-Locks, of which the following is a specification.

This invention relates to nut locks, and pertains especially to that class of nut locks in which keys are arranged to be inserted between the bolt and nut, preventing the turning of the latter.

An object of this invention is to provide a nut lock of the character described, which will require a minimum amount of change in the ordinary bolt and nut, and which may be cheaply and readily manufactured.

It is another object of this invention to provide a nut lock with a simple key, and means for holding the key in position.

It is a further object of this invention to provide a nut lock with a key which may be readily inserted andremoved, and which may be bent to prevent displacement of the key holding means. Y

An embodiment of my invention is disclosed in the accompanying drawing, in which:

Figure 1 is a longitudinal section of a bolt 4partly in elevation showing my invention applied thereto.

Fig. 2 is a section as seen on the line 2--2 of Fig. 1.

Fig. 3 is a section as seen on the line 3--3 of Fig. 1.

Fig. 4 is a perspective view of the key.

Referring more particularly to the drawing, numeral 5 indicates a bolt to which my invention is applied. The bolt is of the usual construction having a threaded end 6. Formed on the end of the bolt 5 and extending longitudinally thereof is a slot 7 forming a key seat and which is adapted to receive a key 8. Key 8 is herein shown as formed with a cylindrical section 9 which is cut away longitudinally as indicated at 10 to form a shoulder 11. The key seat 7 and key 8 are so formed that when the key is in position in the bolt the bottom of the threads will clear the top of the key. The nut 12 with the usual threaded bore has formed thereinv a series of key seats 13. These seats may be of any number, and it is preferable that several be employed in order that one will always be in position to register with the key seat in the bolt 5.

Each of the key'seats 13 is counter-sunk in the nut 12 so that a shoulder 14 is formed against which the cylindrical portion of the key may abut. By countersinking the key seats 13 the key is prevented from being displaced toward the head of the bolt. The counter-sink is of such depth with respect to the cylindrical portion of the key 8 that shoulder 11 when the key is inserted in the nut-will be flush with the surface of nut 12. A jam nut 15 is mounted upon the bolt and moved into contact with nut 12. To lock the nut upon the bolt the former is threaded on to the bolt until it has reached its proper position. rI`he nut is then turned until a key seat 13 registers with the key seat 7. The keyl 8 is then inserted in the key seat until the end of the key -abuts the shoulder 14. The jam nut is now threaded upon the bolt 5 and moved to a position such that it abuts the shoulder 11 and face of the nut 12. In this position the key is lockedv against displacement,l and the nut 12 is locked against rotation. In ordery to prevent displacement of the jam nut 15, I prefer to construct the key of ductile material such that the end may be turned upwardly. Jam nut 15- is counterbored as indicated at 16 and provided with inwardly extending lugs 17. Key 15 is bent upwardly, so that lugs 17 will be abutted by the key and turning of the jam nut prevented. This prevents the displacement of the liam nut and securely locks the nut 12 in position. No vibration of the bolt and nut can effect the nut lock. The nut may be easily removed by turning down the end of the key, removing the jam nut and then the key which frees the nut 12 permits its removal.

The key 8 is of such a character that it may be readily formed from a nai-l, and in case of emergency where it is necessary to constructa key it may be readily formed by means of a file.

It is obvious that I have provided a nut lock which is simple in construction, positive in its operation, and which may be readily manufactured.

What I claim is:

A nut lock for bolts, comprising the combination of a bolt having a longitudinal key 'seat therein at the threaded end, a nut havoutwardly and lugs extending inwardly to abut saidkey andy prevent rotation of said jam nut. ln Witness that I claim the foregoing I have hereunto subscribed my name this 28th day of September, 1916.

THEODORE NUSSBAUM.

a key seat for registration with the key seat in saidloolt, a key of ductile material having a projection thereon, and a jam nut arraiiged to he secured to said bolt and to abut said projection to prevent displacement of said key, said jam nut provided with an enlargement permitting said key to be bent Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Pateilts.' Washington, D. C. 

